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Cake day: June 18th, 2023

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  • mkwt@lemmy.worldtoScience Memes@mander.xyzYEET
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    10 days ago

    And for reference, the earth escape velocity from the surface is 11.2 km/s or 25,000 mph, not 7,000 mph.

    To escape the solar system from the earth surface, the minimum speed is 16.6 km/s, or 37,100 mph. But this assumes that you launch in the correct direction to take the most advantage of the Earth’s 30 km/s. If you launch in the most disadvantageous direction, you can add another 60 km/s to escape.




  • mkwt@lemmy.worldtomemes@lemmy.worldSomething's not adding up
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    22 days ago

    It’s actually because the thing that makes you make those faces is the acceleration, not the speed.

    All three reference frames shown are accelerated, non inertial frames. But the first two have “fictitious” centrifugal accelerations somewhere around 0.5-2.5 g. The third frame has a detectable centrifugal acceleration, but it’s like 0.003 g or something, and can be lumped in with gravity for many types of problems.


  • And ICE right now doesn’t take orders from Trump… They take orders from that other guy. The ACLU knows this because they understand constitutional law. They’re not looking for the concrete deportation plans; they want general background on what the infrastructure looks like, so they can file challenges with the correct factual details quickly if shit does kick off.

    For example, if they get the tail numbers on all the planes they can track them in flightaware or in a worse case by recruiting spotters. If they want to file a lawsuit, they’re gonna need to know some details about who got sent where and when.


  • Any trip to Mars is going to involve massive amounts of personal suffering and privation.

    Minimum mission duration of 3 years. Living space no larger than a small RV. All the food is freeze dried. Can you imagine the smell that will develop? If anything breaks, it’s on you to fix it, and there is no trip down to the hardware store, and no United Rentals to bail you out. Any medical complication? There’s no ER, just whatever you’ve got in the kit.

    And that’s not even starting on the chronic radiation hazard for which there is no viable option to deploy shielding. And a freak solar flare can cook you with acute radiation that will kill you at any time.

    Seriously, we’re talking about an adventure that would be way more epic than Shackleton.









  • The Constitution says that each state shall send electors to the electoral college. So Puerto Rico’s status as an unorganized territory is a bit of a blocker.

    The District of Columbia is also not a part of any state, as specified in the Constitution. However, DC explicitly got some electors in the 23rd amendment, so they can vote for President.

    Really, the idea that the United States might have overseas territories that are not on track to statehood is itself an invention of the twentieth century. (Owing to the 1898 Spanish-American war, which caused the US to take over several parts of the ex-Spanish empire).